This might be a regression of #5842.

• Extension version: 0.106.0
• VSCode Version: Version: 1.98.0 (user setup)
  Commit: 6609ac3d66f4eade5cf376d1cb76f13985724bcb
  Date: 2025-03-04T21:06:18.612Z
  Electron: 34.2.0
  ElectronBuildId: 11044223
  Chromium: 132.0.6834.196
  Node.js: 20.18.2
  V8: 13.2.152.36-electron.0
• OS: Windows_NT x64 10.0.19045
• Repository Clone Configuration (single repository/fork of an upstream repository): single repository
• Github Product (Github.com/Github Enterprise version x.x.x): github.com

Steps to Reproduce:

1. Create a branch and make some commits (all via VS Code)
2. Publish Branch and elect to create a PR
3. Wait for tests etc to be completed
4. Open the PR in VS Code and click on "Create Merge Commit" -- note that a valid email address that is registered as primary email address against GH account is shown just above that button.
5. Get the error message "GraphQL error invalid email address" and no merged PR
6. Change the selected email address to an alternative address also registered with GH and try again -- see it work